I guess that you feel very defensive about this decision still 15 years later which is another reason I wouldn't want my children to go through it. Everything has worked out for you, you claim, and you are still unhappy! I don't want my children to be defined by the things they did when they were 15.
The OP might (or might not) feel defensive but I was in the same boat and really don't. I'm very philosophical about the whole thing-it happened, and due to wonderful support from my parents and my now husband and his family, it turned out very well. It could, obviously, have not, but then again I know plenty of people who have had children later, in established marriages and this has turned out badly. You just never know, do you? I don't think we disagree on that. The part of your post that makes me a bit sad/cross/non-plussed (one of those, I'm just not sure which, yet) is that I have never felt 'defined' by my teenage pregnancy because those around me never defined me that way and so, to be honest, it didn't really occur to me to define myself that way. I was defined in many ways by motherhood, yes, and that is a joyous definition, but not by the fact that motherhood came earlier than is planned.
I've never pretended that it was the 'optimal' choice but, equally, I genuinely can't see the justification of the judgement. I dread to think how it would have affected me if my parents had defined me by my pregnancy or if they hadn't given me the confidence to continue my studies (I'll admit my school were also great) or, worse, if I had been pushed into a termination I didn't want, especially once we had our younger sons. I am also very thankful that none of my friends' parents took the standpoint of not allowing their children to fraternise with me any more. Yes, I'm sure many were
and I am even more sure there were some serious 'don't do what she's done' conversations but again, I felt an atmosphere of support and solidarity, demonstrated by the fact that my five closest friends at school remain my five closest friends now-sadly four since July.
I wasn't devoid of morals, I wasn't a 'chav' (incidentally, a horrendous word with nasty origins) but I did have sex with a lad I genuinely loved. I am thankful every day for him and for my parents and especially for my son.